CN102562223A - Improved automobile exhaust muffler structure - Google Patents
Improved automobile exhaust muffler structure Download PDFInfo
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- CN102562223A CN102562223A CN2011104562451A CN201110456245A CN102562223A CN 102562223 A CN102562223 A CN 102562223A CN 2011104562451 A CN2011104562451 A CN 2011104562451A CN 201110456245 A CN201110456245 A CN 201110456245A CN 102562223 A CN102562223 A CN 102562223A
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Abstract
The invention relates to an improved automobile exhaust muffler structure which comprises a cylinder body (1), a gas inlet pipe (2) and an exhaust pipe (3), wherein the cylinder body (1) is sealed by a front end cover (1-1) and a rear end cover (1-2); a first clapboard (4) and a second clapboard (5) which are axially vertical to the cylinder body (1) are arranged in the cylinder body (1), and the cylinder body (1) is divided by the first clapboard (4) and the second clapboard (5) into a first cavity (6), a second cavity (7) and a third cavity (8), the improved automobile exhaust muffler structure is characterized in that the gas inlet pipe (2) is of a W-shaped bent pipe structure, and the gas inlet pipe (2) is composed of a first straight pipe (2-1), a first transitional punch hole bent pipe (2-2), a transitional straight pipe (2-3), a gas inlet throat (2-4), a second transitional punch hole bent pipe (2-5) and a second straight pipe (2-6); and a flaring is arranged on the end face located in the first cavity (6) of the exhaust pipe (3). According to the improved automobile exhaust muffler structure, the problem that an exhaust back pressure of the gas flow speed is increased by continuous expansion and compression of gas due to the the structures of the gas inlet pipe, a gas outlet pipe and a transitional pipe is solved, the power torque of an engine is increased, and the low frequency noise is effectively reduced.
Description
Technical field
The present invention relates to a kind of silencing apparatus, especially a kind of automobile exhaust muffler particularly relates to a kind of automobile exhaust muffler that improves structure.Belong to auto parts machinery and manufacturing technology field.
Background technique
Exhaust sound is the most important noise source of automobile; Therefore; Need on automobile, to install exhaust silencer; Exhaust sound through the exhaust silencer Control of Automobile is effective noise reduction measure, and the design level of silencing apparatus has very big influence to the noise quality index of automobile, study and design eliminate the noise effective, power loss is low, the rational exhaust silencer of processability of product structure is necessary.The structure of employed most of silencing apparatuss is following on the automobile at present: in the housing of sealing; First, second dividing plate is arranged to vertical, space with housing shaft, and enclosure interior is isolated into first, second expansion chamber and three chambers of resistance noise reduction chamber.Suction tude, steam outlet pipe and transition tube and housing parallel to an axis, arrange the space.Suction tude penetrates in second expansion chamber after once passing housing front cover and first, second dividing plate outward by housing.Steam outlet pipe passes housing after left chamber passes first, second dividing plate and rear end cover successively.Transition tube penetrates in second expansion chamber after first expansion chamber is passed first, second dividing plate.Suction tude, steam outlet pipe and transition tube are straight tube, are distributed with aperture on it.
Above-mentioned existing technology structure exhaust silencer, because suction tude, steam outlet pipe and transition tube are straight tube, exhaust airstream gets into from suction tude; Through transition tube; From the process that steam outlet pipe is discharged, gas is caused air-flow velocity to increase by constantly expansion and compression; The increase of exhaust airstream speed causes exhaust back pressure to increase, and the engine power moment of torsion descends.
Summary of the invention
The objective of the invention is constantly to be increased the problem that exhaust back pressure is increased owing to suction tude, steam outlet pipe and transition tube structure cause gas by expansion and compression back in order to solve the existing technology airspeed; A kind of automobile exhaust muffler that improves structure is provided, and the automobile exhaust muffler of this improvement structure can increase the engine power moment of torsion, effectively eliminate low-frequency noise.
The object of the invention can reach through following technological scheme:
A kind of automobile exhaust muffler that improves structure comprises cylindrical shell, suction tude and outlet pipe, and cylindrical shell is by front cover and rear end cover sealing; In cylindrical shell, be provided with and cylindrical shell first dividing plate and second partition; By first dividing plate and second partition housing is separated into first cavity, second cavity and the 3rd cavity; Its structural feature is: said suction tude is a W type bend pipe structure, and this suction tude is made up of first straight tube, first transition perforation bend pipe, transition straight tube, air inlet trunnion, second transition perforation bend pipe and second straight tube; First straight tube passes first cavity, second cavity successively and in the 3rd cavity, is connected with first transition perforation bend pipe from an outer end of cylindrical shell; First transition perforation bend pipe is connected with second transition perforation bend pipe through the transition straight tube; The air inlet trunnion is arranged on the Vertical direction of transition straight tube, and second straight tube is connected with second transition perforation bend pipe and passes in second cavity to the first cavity through the 3rd cavity; The end face that outlet pipe is positioned at first cavity is provided with the loudspeaker enlarging, and the outlet pipe body is passed another outer end of second cavity and second cavity to cylindrical shell by first cavity.
The object of the invention can also reach through following technological scheme:
Further technical solution is: described front cover, first dividing plate, second partition and rear end cover be oval in shape all.
Further technical solution is: the part that said outlet pipe is positioned at the 3rd cavity can offer several apertures, is coated with reed at the aperture place that offers and not manages, and said reed is filled with sound-absorbing material in not managing.
Further technical solution is: the end of said first straight tube outside cylindrical shell is the inlet end of suction tude; An end and second straight tube the end first cavity in of said air inlet trunnion in second cavity is two outlet sides of suction tude.
Further technical solution is: can be respectively equipped with three row's perforation on said first transition perforation bend pipe and second transition perforation bend pipe, make the 3rd cavity form a resonant cavity through perforation.
Further technical solution is: said air inlet trunnion is connected with the transition straight tube makes second cavity can form a resonant cavity.
The present invention has following outstanding beneficial effect:
1, the present invention since between the inlet end of suction tude and two outlet sides with the transition bend pipe transition of boring a hole; Make air-flow can flow through the transition straight tube smoothly; Perforated section on the transition perforation bend pipe makes the 3rd cavity at place form a resonant cavity; Therefore, has the outstanding effect that has reduced flow resistance, reduced exhaust back pressure and eliminated the band segment noise; And suction tude is in the outlet side of second cavity, forms a resonant cavity through trunnion, and this resonant cavity is reduced low-frequency noise.
2, the present invention is provided with enlarging because outlet pipe is positioned at the end face of first cavity; The enlarging structure is connected smoothly through rounding and its body, therefore can guarantee that exhaust airstream can wall not occur with pipeline and separate, and can reduce exhaust airstream speed; Can make exhaust airstream through after level and smooth expansion and shrinking; Speed reduces greatly, and exhaust back pressure reduces, and the engine power moment of torsion is improved.
3, the present invention is rational in infrastructure, and is easy to use, practical, and long service life can reduce the noise pollution of environment, has satisfied vast civic demand.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention 1.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Wherein, the 1-cylindrical shell, the 2-suction tude, the 3-outlet pipe, 4-first dividing plate, the 5-second partition, 6-first cavity, 7-second cavity, 8-the 3rd cavity, the 9-reed is not managed.
Embodiment
Specific embodiment 1:
Fig. 1, Fig. 2 and Fig. 3 constitute specific embodiment 1 of the present invention.
With reference to Fig. 1, Fig. 2 and Fig. 3; Present embodiment comprises cylindrical shell 1, suction tude 2 and the outlet pipe 3 with front cover 1-1 and rear end cover 1-2 sealing; Be provided with first dividing plate 4 and second partition 5 axially vertical in the said cylindrical shell 1 with cylindrical shell 1; Said first dividing plate 4 is arranged with second partition 5 spaces and housing 1 is separated into first cavity 6, second cavity 7 and the 3rd cavity 8 successively, and said suction tude 2 forms W type bend pipe structure by the first straight tube 2-1, first transition perforation bend pipe 2-2, transition straight tube 2-3, air inlet trunnion 2-4, second transition perforation bend pipe 2-5 and the second straight tube 2-6; The said first straight tube 2-1 is passed in first cavity 6 and second cavity, 7 to the 3rd cavitys 8 and with first transition perforation bend pipe 2-2 by cylindrical shell 1 one end outsides and is connected; Said first transition perforation bend pipe 2-2 bores a hole with second transition and is connected through transition straight tube 2-3 between the bend pipe 2-5; Said air inlet trunnion 2-4 is arranged on the Vertical direction of transition straight tube 2-3, and the said second straight tube 2-6 is connected with second transition perforation bend pipe 2-5 and is passed in second cavity, 7 to first cavitys 6 by the 3rd cavity 8; The end face that said outlet pipe 3 is positioned at first cavity 1 is provided with enlarging 3-1 and passes second cavity 6 and second cavity 7 to the cylindrical shell, 1 the other end outside through this enlarging 3-1 by first cavity 1.
In the present embodiment, described front cover 2, first dividing plate 5, second partition 8 and rear end cover 17 be oval in shape all.The part that said outlet pipe 3 is positioned at the 3rd cavity 8 offers several apertures, is coated with reed at the aperture place that offers and not manages 9, and said reed is not managed and is filled with sound-absorbing material in 9.The end of the said first straight tube 2-1 outside cylindrical shell 1 is the inlet end of suction tude 1; An end and second straight tube 2-6 the end first cavity 6 in of said air inlet trunnion 2-4 in second cavity 7 is two outlet sides of suction tude 1.Be respectively equipped with three row's perforation on said first transition perforation bend pipe 2-2 and second transition perforation bend pipe 2-5.
The working principle of present embodiment is:
The gas that motor is discharged flows to from the first straight tube 2-1 of suction tude 2, and through the transition of transition perforation bend pipe 2-2, the part of gas flows into the 3rd cavity 8 through the perforation on the transition perforation bend pipe 2-2, forms resonance; A part flows into transition straight tube 2-3 in addition.A gas part that flows into transition straight tube 2-3 flows into air inlet trunnion 2-4 and gets into second cavity 7, produces resonance, and low-frequency noise obtains very big reduction; Remaining a part of gas stream is through transition perforation bend pipe 2-5, and portion gas flows into the 3rd cavity 8 through perforation and forms resonance, and remaining gas flows into first cavity 6 through the second straight tube 2-6.Gas gets into outlet pipe 3 behind first cavity, 6 intramedullary expansions enlarging 3-1 shrinks, and reduces greatly through gas-flow resistance after the level and smooth transition, thereby has reduced exhaust back pressure, flows into the body of outlet pipe 3 again; The elimination that the body of outlet pipe 3 is not managed sound-absorbing material in 9 through the diffusion and the reed of the 3rd cavity 8 place's apertures, high-frequency noise is reduced.
Need to prove; Above-described embodiment is a preferred forms of the present invention; But the technological scheme that the present invention requires to protect is not limited to this specific embodiment, anyly is equal to replacement or changes according to technological scheme of the present invention and design thereof, all belongs to protection scope of the present invention.
Claims (6)
1. an automobile exhaust muffler that improves structure comprises cylindrical shell (1), suction tude (2) and outlet pipe (3), and cylindrical shell (1) is by front cover (1-1) and rear end cover (1-2) sealing; In cylindrical shell (1), be provided with and cylindrical shell (1) first dividing plate (4) and second partition (5); By first dividing plate (4) and second partition (5) housing (1) is separated into first cavity (6), second cavity (7) and the 3rd cavity (8); It is characterized in that: said suction tude (2) is W type bend pipe structure, and this suction tude (2) is made up of first straight tube (2-1), first transition perforation bend pipe (2-2), transition straight tube (2-3), air inlet trunnion (2-4), second transition perforation bend pipe (2-5) and second straight tube (2-6); First straight tube (2-1) passes first cavity (6), second cavity (7) successively and in the 3rd cavity (8), is connected with first transition perforation bend pipe (2-2) from an outer end of cylindrical shell (1); First transition perforation bend pipe (2-2) is connected with second transition perforation bend pipe (2-5) through transition straight tube (2-3); Air inlet trunnion (2-4) is arranged on the Vertical direction of transition straight tube (2-3), and second straight tube (2-6) is connected with second transition perforation bend pipe (2-5) and passes second cavity (7) to first cavity (6) through the 3rd cavity (8); The end face that outlet pipe (3) is positioned at first cavity (1) is provided with loudspeaker enlarging (3-1), and outlet pipe (3) body is passed another outer end of second cavity (6) and second cavity (7) to cylindrical shell (1) by first cavity (1).
2. a kind of automobile exhaust muffler according to claim 1 is characterized in that: said front cover (2), first dividing plate (5), second partition (8) and each oval in shape of rear end cover (17).
3. a kind of automobile exhaust muffler according to claim 1; It is characterized in that: the part that said outlet pipe (3) is positioned at the 3rd cavity (8) is provided with several apertures; Be coated with reed at said aperture place and not manage (9), not manage in (9) in reed and be filled with sound-absorbing material.
4. a kind of automobile exhaust muffler according to claim 1 is characterized in that: the end of said first straight tube (2-1) outside cylindrical shell (1) is the inlet end of suction tude (1); An end and second straight tube (2-6) the end first cavity (6) in of said air inlet trunnion (2-4) in second cavity (7) is two outlet sides of suction tude (1).
5. a kind of automobile exhaust muffler according to claim 1 is characterized in that: be respectively equipped with three row's perforation on said first transition perforation bend pipe (2-2) and second transition perforation bend pipe (2-5), make the 3rd cavity (8) form a resonant cavity through perforation.
6. a kind of automobile exhaust muffler according to claim 1 is characterized in that: said air inlet trunnion (2-4) is connected with transition straight tube (2-3) makes second cavity (7) form a resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456245.1A CN102562223B (en) | 2011-12-29 | 2011-12-29 | The automobile exhaust muffler of a kind of modified node method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456245.1A CN102562223B (en) | 2011-12-29 | 2011-12-29 | The automobile exhaust muffler of a kind of modified node method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102562223A true CN102562223A (en) | 2012-07-11 |
| CN102562223B CN102562223B (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110456245.1A Active CN102562223B (en) | 2011-12-29 | 2011-12-29 | The automobile exhaust muffler of a kind of modified node method |
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| Country | Link |
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| CN (1) | CN102562223B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135364A (en) * | 2021-12-07 | 2022-03-04 | 杭叉集团股份有限公司 | Three-channel parallel double-resonant-cavity exhaust muffler for industrial vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482754A (en) * | 2021-07-30 | 2021-10-08 | 重庆长安汽车股份有限公司 | Noise eliminator and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58148215A (en) * | 1982-02-25 | 1983-09-03 | Nissan Motor Co Ltd | Muffler of automobile engine |
| CN2921306Y (en) * | 2006-06-28 | 2007-07-11 | 力帆实业(集团)有限公司 | Impedance composite noise silencer |
| US20090000863A1 (en) * | 2007-06-28 | 2009-01-01 | Share Win Industry Co., Ltd. | Exhaust pipe |
| CN101694172A (en) * | 2009-09-30 | 2010-04-14 | 重庆长安汽车股份有限公司 | Automobile muffler for reducing exhaust back pressure |
-
2011
- 2011-12-29 CN CN201110456245.1A patent/CN102562223B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58148215A (en) * | 1982-02-25 | 1983-09-03 | Nissan Motor Co Ltd | Muffler of automobile engine |
| CN2921306Y (en) * | 2006-06-28 | 2007-07-11 | 力帆实业(集团)有限公司 | Impedance composite noise silencer |
| US20090000863A1 (en) * | 2007-06-28 | 2009-01-01 | Share Win Industry Co., Ltd. | Exhaust pipe |
| CN101694172A (en) * | 2009-09-30 | 2010-04-14 | 重庆长安汽车股份有限公司 | Automobile muffler for reducing exhaust back pressure |
Non-Patent Citations (3)
| Title |
|---|
| 刘志恩等: "轿车车内噪声品质改进研究", 《噪声与振动控制》 * |
| 刘文礼: "摩托车消声器的性能分析及改进设计", 《中北大学学位论文》 * |
| 罗虹等: "消声器共振腔及穿孔隔板消声特性数值分析", 《机械设计与制造》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135364A (en) * | 2021-12-07 | 2022-03-04 | 杭叉集团股份有限公司 | Three-channel parallel double-resonant-cavity exhaust muffler for industrial vehicle |
| CN114135364B (en) * | 2021-12-07 | 2023-09-15 | 杭叉集团股份有限公司 | Three-channel parallel double-resonant-cavity industrial vehicle exhaust muffler |
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| Publication number | Publication date |
|---|---|
| CN102562223B (en) | 2016-06-08 |
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